. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. This specimen has been chosen because it exhi- bits the termination of a considerable arterial branch •wholly in Malpighian tufts, and because the several Malpighian bodies injected show different appear- ances of a very instructive kind. «, arterial branch •with its terminal twigs; at a the injection has only partially filled the tuft, at /3 it has entirely filled it, and has also passed out along the efferent vessel, e, without any extravasation, at y it has burst into the capsule and escaped along the tube t, but has
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. This specimen has been chosen because it exhi- bits the termination of a considerable arterial branch •wholly in Malpighian tufts, and because the several Malpighian bodies injected show different appear- ances of a very instructive kind. «, arterial branch •with its terminal twigs; at a the injection has only partially filled the tuft, at /3 it has entirely filled it, and has also passed out along the efferent vessel, e, without any extravasation, at y it has burst into the capsule and escaped along the tube t, but has also filled the efferent vessel e, at 3 and i it has been extravasated and passed along the tube, at m and m, the injection on escaping into the capsule has not spread over the whole tuft. Magnified about forty-five diameters. From the human sub- ject. {After Bowman.} This very interesting phenomenon of ciliary motion in the neck of the tube and in the Malpighian capsule was discovered by Mr. Bowman in the frog ; and at the time when his paper was published he had not observed it in any other animal. Mr. Simon* after- wards observed it, as he says, " at the origin of each uriniferous tubule in the kidneys of various other reptiles, and also with perfect distinctness in the ; Bidder-f- has since observed the same phenomenon in the triton ; Kolliker| has described it in the embryo liz- ard ; and I have seen it in the common snake. * A Physiological Essay on the Thynius Gland, by John Simon, 'f Miiller's Archiv. j Miiller's Archiv. Fig. 158. ,..r.,,.\. From the frog; viewed by transmitted light. Shows the continuity of the Malpighian capsule with the tube, the change in the character of the epi- thelium, and the vascular tuft, c, basement mem- brane of the tube; b, epithelium of the tube; a, cavity of the tube; //, basement membrane of the capsule ; d, epithelium of the neck of the tube and of the neighbouring part of the capsule, this ep
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